feat: deterministic sheet-list reconciliation (cover index vs identified sheets)

tests/test_sheet_reconcile.py

@@ -0,0 +1,86 @@
+"""Deterministic sheet-list reconciliation: cover index vs extracted sheets."""
+
+from backend.sheet_reconcile import declared_sheet_list, reconcile_sheets
+
+COVER_TEXT = """VERIZON CYPRESS
+SHEET LIST
+SHEET NUMBER
+SHEET NAME
+G000
+COVER
+G001
+GENERAL INFO
+C-001
+CIVIL COVER
+C-001.1
+ALTA SURVEY
+L-101
+LANDSCAPE PLAN
+S101
+FOUNDATION PLAN
+S301
+WALL SECTIONS
+S401
+PERSPECTIVE VIEW
+A101
+FLOOR PLAN
+A102
+REFLECTED CEILING PLAN
+E400
+ELECTRICAL SITE PLAN
+"""
+
+
+def test_declared_sheet_list_from_cover():
+    declared = declared_sheet_list({1: COVER_TEXT, 2: "symbols legend"})
+    assert declared[0] == "G000"
+    assert "C-001" in declared and "C-001.1" in declared  # hyphenated ids kept
+    assert "L-101" in declared
+    assert "A102" in declared
+    assert declared.count("G000") == 1
+    assert len(declared) == 11
+
+
+def test_declared_sheet_list_uses_first_index_page_only():
+    texts = {1: "no index here", 2: COVER_TEXT, 3: "SHEET LIST\nXX999\nBOGUS"}
+    declared = declared_sheet_list(texts)
+    assert "XX999" not in declared  # only the first marker page is parsed
+
+
+def test_declared_sheet_list_none_when_no_marker():
+    assert declared_sheet_list({1: "just notes", 2: "floor plan stuff"}) == []
+
+
+def _sheets(*nums):
+    return [{"page_number": i + 1, "sheet_number": n}
+            for i, n in enumerate(nums)]
+
+
+def test_reconcile_both_directions():
+    declared = declared_sheet_list({1: COVER_TEXT})
+    rec = reconcile_sheets(_sheets("G000", "G001", "S101", "S301", "S302", "A101"),
+                           declared)
+    # declared but not extracted (civil/landscape not in this PDF + missing)
+    assert "C-001" in rec["declared_not_in_set"]
+    assert "A102" in rec["declared_not_in_set"]
+    assert "E400" in rec["declared_not_in_set"]
+    # extracted but not on the cover index (misread or unlisted sheet)
+    assert rec["in_set_not_declared"] == ["S302"]
+    assert rec["declared_total"] == 11
+    assert rec["found_total"] == 6
+
+
+def test_reconcile_normalizes_hyphens():
+    declared = ["C-001", "S301"]
+    rec = reconcile_sheets(_sheets("C001", "S301"), declared)
+    assert rec["declared_not_in_set"] == []
+    assert rec["in_set_not_declared"] == []
+
+
+def test_reconcile_ignores_unidentified_sheets():
+    rec = reconcile_sheets(
+        [{"page_number": 8, "sheet_number": None},
+         {"page_number": 9, "sheet_number": "S301"}],
+        ["S301", "A102"])
+    assert rec["found_total"] == 1
+    assert rec["declared_not_in_set"] == ["A102"]